The vertically-aligned set of LEDs make an easy and dramatic demonstration of the relationship between the color and wavelength of light. The spectral range of each LED can be investigated with a spectrometer, or just viewed for comparisons with each other and with the “white” LED spectrum. Each LED can be turned on individually with the rotary switch on the top of the column. Includes power supply. It can also be used to approximate planck's constant.
Series of ten single-color LED’s cover the visible spectrum, plus one “white” wide spectrum LED
Each LED can be selected individually, or all together
Demonstrates the color-wavelength relationship
Height: 33.5 cm, Base diameter: 10 cm, Column diameter: 3.3 cm
Weight: 485g (including power supply)
Power supply: Input:110-240VAC 50/60Hz, 0.3A; Output: 5VDC, 2A